CN116442514A - Curved surface layering 3D printing path planning method and system - Google Patents
Curved surface layering 3D printing path planning method and system Download PDFInfo
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- 238000010146 3D printing Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 36
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- 230000001131 transforming effect Effects 0.000 claims abstract description 10
- 238000007639 printing Methods 0.000 claims description 33
- 238000004590 computer program Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000003854 Surface Print Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention belongs to the technical field of 3D printing pretreatment, and provides a curved surface layering 3D printing path planning method-level system, which specifically comprises the following steps: performing three-dimensional modeling on the printed component with the curved surface structure; acquiring a triangular patch file with a curved surface structure model; resolving triangular patch coordinates of a triangular patch (STL) file; performing projective transformation on the curved surface structure model to realize three-dimensional solid transformation of the model; adopting a traditional plane layering algorithm to carry out path planning of the three-dimensional entity in the transformed three-dimensional entity model; and inversely transforming the three-dimensional solid model after the path planning is completed by adopting a planar layering algorithm into the original three-dimensional solid structure to complete the curved surface path planning. The invention adopts a curved surface layering mode to effectively solve the problem that the part construction can only print along a fixed single direction when in planar layering, improves the mechanical property of the part, and solves the problem that the strength can not be met when thin walls, micro-bending (shell) and other components with bending characteristics are manufactured by planar layering.
Description
Technical Field
The invention belongs to the technical field of 3D printing pretreatment, and particularly relates to a curved surface layering 3D printing path planning method and system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, the conventional manufacturing technology generally has the problems of poor working environment, multiple and complex working procedures, long mold manufacturing period, difficult component iteration, low batch processing cost and the like.
The additive manufacturing technology is an advanced manufacturing technology different from the traditional manufacturing technology, a product mold does not need to be processed in advance, and only three-dimensional CAD data is directly printed into a three-dimensional model component through a 3D printer.
At present, planar layered manufacturing in additive manufacturing is common in application in 3D printing due to simple process and convenient manufacturing, and the technology is more mature.
The planar layering manufacturing is to stack materials layer by layer along a single direction on a plane through a printer nozzle to form a printing member, but the printing member is discontinuous due to the fact that the printing member is stacked layer by layer along the single direction, when the printing member is printed with a thin section, a micro-bending (shell) and other members, the strength of the printing member is reduced, even the printing is failed, the development of 3D printing is greatly affected, for example, continuous fibers are difficult to freely distribute on a space curved surface due to the adoption of planar layering manufacturing in the 3D printing field of continuous fiber composite materials, continuous controllable laying cannot be carried out, and the strength of the continuous fiber composite material member is greatly reduced; in the field of 3D printing of micro-nano additive manufacturing circuits, planar layered printing results are often not satisfactory when printing some micro-non-planar structures, and when a printed circuit board is provided with a curved plastic component such as a conductive electronic track, the planar layered manufacturing can cause the continuity of the circuit to be interrupted in the middle of the layers, so that the printing results are seriously affected.
Meanwhile, the problems of step effect and the like are caused by stacking the printed components layer by layer along a single direction during planar layered manufacturing, particularly, the step effect is more obvious during printing of curved surface structures and thin shell structures, the surface quality of the printed components is poor, the processing efficiency is low, the strength requirement of the printed components cannot be met, and the problem of warp deformation is caused; this results in planar layered fabrication appearing to be weak in printed curved structures.
Disclosure of Invention
In order to solve at least one technical problem in the background art, the invention provides a curved surface layering 3D printing path planning method and a curved surface layering 3D printing path planning system, which can directly plan a path according to a curved surface structure, solve the problem that continuous fibers are difficult to freely distribute on a space curved surface, realize controllable distributed printing of continuous fiber composite materials on the curved surface, and provide a good solution for controllable printing of circuits on the curved surface structure; meanwhile, the problems of poor surface finish degree 'step effect' of planar layered printing, reduced strength of printing components, buckling deformation during printing and the like are solved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the first aspect of the invention provides a curved surface layering 3D printing path planning method, which comprises the following steps:
performing three-dimensional modeling on a component to be printed, which has a curved surface structure, and generating a three-dimensional solid model of the corresponding component;
analyzing the three-dimensional solid model of the component to obtain triangular patch point coordinates;
according to the structure of the component to be printed, adopting a corresponding projection transformation rule, discretizing the surface into points according to the coordinates of the triangular patch points, and carrying out space projection transformation on the three-dimensional solid model of the component to obtain a transformed three-dimensional solid model;
and carrying out layered slicing and path planning on the transformed three-dimensional solid model, inversely transforming the three-dimensional solid model after path planning into an original three-dimensional solid structure, and generating a curved surface printing path.
A second aspect of the present invention provides a curved surface hierarchical 3D printing path planning system, comprising:
the three-dimensional modeling module is used for carrying out three-dimensional modeling on the component with the curved surface structure to be printed and generating a three-dimensional solid model of the corresponding component;
the three-dimensional solid model analysis module is used for analyzing the three-dimensional solid model of the component to obtain triangular patch point coordinates;
the projection conversion module is used for discretizing the surface into points according to the coordinates of the triangular patch points by adopting a corresponding projection conversion rule according to the structure of the component to be printed, and carrying out space projection conversion on the three-dimensional solid model of the component to obtain a converted three-dimensional solid model;
and the printing path planning module is used for carrying out layering slicing and path planning on the transformed three-dimensional solid model, inversely transforming the three-dimensional solid model after the path planning into an original three-dimensional solid structure and generating a curved surface printing path.
A third aspect of the present invention provides a computer-readable storage medium.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of a curved surface hierarchical 3D printing path planning method as described above.
A fourth aspect of the invention provides a computer device.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps in a curved hierarchical 3D printing path planning method as described above when the program is executed.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts a curved surface layering mode to effectively solve the problem that the part construction can only print along a fixed single direction when in planar layering, improves the mechanical property of the part, solves the problem that the strength can not be met when the planar layering manufacturing thin-section and micro-bending (shell-type) part, and further improves the mechanical property of the 3D printing curved surface structure.
2. The invention can directly plan the path according to the curved surface structure, solves the problems that continuous fibers are difficult to freely distribute on a space curved surface, and the like, realizes controllable distributed printing of continuous fiber composite materials on the curved surface, and provides a good solution for controllable printing of circuits on the curved surface structure; and solves the problems of poor surface finish degree 'step effect' of planar layered printing, reduced strength of printing components, warp deformation during printing and the like.
Additional aspects of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flow chart of a method for planning a 3D printing path for a curved surface structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating projection transformation of a given curved surface to any given plane for a curved surface shell structure according to an embodiment of the present invention;
FIG. 3 is a schematic view illustrating a curved shell structure according to an embodiment of the present invention in any given planar path planning;
FIG. 4 is a schematic three-dimensional view of a curved surface non-thin shell structure model according to a second embodiment of the present invention;
FIG. 5 is a schematic front view of a projection transformation of a curved surface non-thin shell structure model according to an embodiment of the present invention;
FIG. 6 is a schematic representation of a three-dimensional transformation of a curved surface non-thin shell structure model according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Interpretation of the terms
STL (STereoLithography) is a file format created by 3D Systems software, inc. It has a number of post-mortem cursors such as "standard trigonometric language (Standard Triangle Language)", "standard tessellation language (Standard Tessellation Language)", "stereolithography language (STereolithography Language)", and "(stereolithography tessellation language)". Many packages of software support this format, which is widely used for rapid prototyping, 3D printing and Computer Aided Manufacturing (CAM). The STL file describes only the surface geometry of a three-dimensional object, without color, texture mapping, or other attributes of a common three-dimensional model. The STL format has two types, text and binary. Text patterns are more common because they have good readability and can be read directly.
The STL file describes the three-dimensional triangular cartesian coordinate system for vertices of the original unstructured triangular mesh ordered by surface unit normal and by right hand rule. The STL coordinates must be positive numbers, without scale information, and the unit of measure is arbitrary.
As mentioned in the background art of the invention, the printing of curved structures in the prior art has the problems of 'step effect' in planar layered manufacturing, poor printing surface quality, low processing efficiency, buckling deformation, improvement of mechanical properties of printing components and the like.
The invention provides a curved surface layering 3D printing path planning method, which comprises the steps of carrying out three-dimensional modeling on a component to be printed, generating an STL model of the component, analyzing coordinates of triangular surface patch points through the STL model, selecting a three-dimensional entity with a curved surface structure to carry out projection transformation, realizing three-dimensional entity transformation of the model based on the projection transformation rule, carrying out path planning by adopting a traditional planar layering slicing algorithm in the transformed three-dimensional entity model, and finally reversely transforming the three-dimensional entity model subjected to path planning by adopting the traditional planar layering algorithm into an original three-dimensional entity structure to complete path planning of the curved surface structure. The method and the idea are provided for the development of the 3D printing technology of the curved surface structure of the subsequent additive manufacturing.
Example 1
Referring to fig. 1, the present embodiment provides a curved surface layered 3D printing path planning method, including the following steps:
the member to be printed with the curved surface structure in this embodiment may be a curved surface thin shell member or a non-thin shell member with a curved surface structure.
When the curved surface structural member to be printed is a curved surface thin shell member, the 3D printing path planning method specifically comprises the following steps:
s1: performing three-dimensional modeling on the curved thin-shell component to be printed to generate a three-dimensional solid model of the corresponding component;
in S1, three-dimensional modeling can be performed on a curved structural member to be printed by using Computer Aided Design (CAD) software; for example Autodesk Inventor, solidWorks, hopefully 3D, CATIA, pro/E, onespace, autoCAD or UG NX, etc.
As shown in fig. 2, three-dimensional modeling of a curved structural member to be printed is performed.
S2: analyzing the three-dimensional solid model of the component to obtain triangular patch point coordinates;
the curved surface structure model generated in the CAD software for S1 is imported into computer aided manufacturing CAM software having a function of deriving a model STL file, and a triangular patch slice is performed to generate an STL triangular patch file.
For example, UG NX, pro/NC, CATIA, masterCAM, surfCAM, SPACE-E, CAMWORKS, workNC, TEBIS, hyperMILL, powermill, gibbs CAM, FEATURECAM, topsolid, solidcam, cimatron, vx, esprit, gibbscam, or edge CAM, etc.
S3: analyzing the STL file to obtain coordinates of each point of the curved triangular patch;
carrying out triangular patch slicing and exporting on the curved surface structure three-dimensional model of the component to generate an STL file, and analyzing and obtaining each coordinate of the curved surface triangular patch;
s4: according to the structure of the component to be printed, adopting a corresponding projection transformation rule, discretizing the surface into points according to the coordinates of the triangular patch points, and carrying out space projection transformation on the three-dimensional solid model of the component to obtain a transformed three-dimensional solid model;
in this embodiment, three-dimensional solid transformation of the model may be implemented according to a certain projective transformation rule; projective transformation the appropriate projective transformation rules may be selected to perform three-dimensional solid transformation of the model based on the print specific structure.
For example, in this embodiment, a curved surface triangular patch (STL) file is obtained through the steps S1, S2, and S3 for a model having a curved surface structure, and each coordinate value of the curved surface triangular patch is obtained by parsing;
the adoption of the corresponding projection transformation rule discretizes the surface into points according to the coordinates of the triangular patch points, and carries out space projection transformation on the three-dimensional entity model of the component, and the method specifically comprises the following steps:
s401: as shown in fig. 3, each coordinate value of the acquired curved triangular patches is projected onto a given arbitrary plane (ax+by+cz+d=0) BY means of vertical projection (parallel to the coordinate axes);
s402: coordinates on a three-dimensional solid model of a component to be printedProjection onto the plane to obtain projection coordinates +.>
S403: calculating the normal vector of the planeI.e. < ->And calculating the distance +/of any point on the curved surface structure model to the given plane>
S404: calculating the normal vector of the plane, and further calculating the vector from the point on the curved surface structure model to the given arbitrary plane and the distance between the two points to obtain a projection coordinate value;
obtaining the coordinate P on the printing member based on the normal vector of the plane i P projected onto a plane j Vector of (2) isCan be solved outAnd according to the formula between two pointsDeriving->
Finally, the projection coordinate value of the curved surface can be obtained
And carrying out three-dimensional projection transformation on the curved surface structure model according to the projection rule to form a three-dimensional entity model.
It should be noted that the projective transformation rules are not unique, and specific three-dimensional solid projective transformation needs to be performed by adopting different transformation rules according to the three-dimensional solid model to be printed.
S5: and carrying out layered slicing and path planning on the transformed three-dimensional solid model, inversely transforming the three-dimensional solid model after path planning into an original three-dimensional solid structure, and generating a curved surface printing path.
S5, carrying out layering slicing on the transformed three-dimensional entity model by adopting a traditional plane layering algorithm, or carrying out path planning of the three-dimensional entity, such as ReplicatorG, repetierH, cura, XBuilder, maker Bot, slice 3r or Simplify3D and the like by adopting a traditional plane layering algorithm in 3D printing slice path generation software; for example, the conventional plane layering algorithm may use a Zigzag path filling algorithm to perform path filling, and the printing method most commonly used at present is not described herein.
S6: and inversely transforming the three-dimensional solid model subjected to path planning by adopting a traditional planar layering algorithm into the original three-dimensional solid structure to complete curved surface structure path planning.
When the curved surface structural member to be printed is of a curved non-thin shell structure, the 3D printing path planning method of the curved surface structural member is consistent with the 3D printing path planning method of the curved surface thin shell member;
the method is characterized in that a three-dimensional model is taken as input, the model is exported as an STL file, triangular surface patch coordinates are analyzed, a non-thin shell structure model with a curved surface is subjected to space projection three-dimensional solid transformation through any given projection plane, a new three-dimensional solid model is transformed through the space projection three-dimensional solid transformation, then a traditional plane slicing algorithm is carried out in the transformed three-dimensional solid model to carry out path planning, and after the path planning is completed, inverse transformation is carried out, and the inverse transformation is carried out to the original three-dimensional solid model to complete printing path planning.
The method comprises the following specific steps:
1) Three-dimensional modeling is carried out on the to-be-printed curved non-thin-shell structure model, and the three-dimensional modeling is carried out on the to-be-printed curved non-thin-shell structure model through the existing computer aided design CAD software, wherein the three-dimensional modeling is shown in a schematic diagram 4;
2) Exporting and analyzing an STL file of the curved non-thin-shell three-dimensional model;
3) Transforming a three-dimensional entity structure model with a curved upper surface into a three-dimensional entity structure model with a plane upper surface through space projection three-dimensional entity transformation, wherein the corresponding transformation process is shown in a schematic diagram 5, and the transformed three-dimensional entity is shown in a schematic diagram 6;
4) Slicing and path planning are carried out in the transformed three-dimensional solid model by adopting a traditional plane layering algorithm;
5) And (3) inversely changing the three-dimensional solid model after the path planning is completed, and converting the three-dimensional solid model into an original three-dimensional solid model to complete the path planning of the curved surface structure.
The technical scheme has the advantages that the controllable printing of the curved surface structure is realized, the step effect of 3D printing of the curved surface structure model is solved, the surface quality of a printing member is improved, and the problems that the processing efficiency is low, the printing warp deformation occurs, the strength of the printing curved surface member manufactured by adopting plane layering is not satisfied and the like are effectively solved.
Example two
The embodiment provides a curved surface layering 3D printing path planning system, which comprises:
the three-dimensional modeling module is used for carrying out three-dimensional modeling on the component with the curved surface structure to be printed and generating a three-dimensional solid model of the corresponding component;
the three-dimensional solid model analysis module is used for analyzing the three-dimensional solid model of the component to obtain triangular patch point coordinates;
the projection conversion module is used for discretizing the surface into points according to the coordinates of the triangular patch points by adopting a corresponding projection conversion rule according to the structure of the component to be printed, and carrying out space projection conversion on the three-dimensional solid model of the component to obtain a converted three-dimensional solid model;
and the printing path planning module is used for carrying out layering slicing and path planning on the transformed three-dimensional solid model, inversely transforming the three-dimensional solid model after the path planning into an original three-dimensional solid structure and generating a curved surface printing path.
Example III
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in a curved surface hierarchical 3D printing path planning method as described above.
Example IV
The embodiment provides a computer device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps in the curved surface layering 3D printing path planning method when executing the program.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random access Memory (Random AccessMemory, RAM), or the like.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The curved surface layering 3D printing path planning method is characterized by comprising the following steps of:
performing three-dimensional modeling on a component to be printed, which has a curved surface structure, and generating a three-dimensional solid model of the corresponding component;
analyzing the three-dimensional solid model of the component to obtain triangular patch point coordinates;
according to the structure of the component to be printed, adopting a corresponding projection transformation rule, discretizing the surface into points according to the coordinates of the triangular patch points, and carrying out space projection transformation on the three-dimensional solid model of the component to obtain a transformed three-dimensional solid model;
and carrying out layered slicing and path planning on the transformed three-dimensional solid model, inversely transforming the three-dimensional solid model after path planning into an original three-dimensional solid structure, and generating a curved surface printing path.
2. The curved surface layering 3D printing path planning method according to claim 1, wherein after the three-dimensional solid model of the corresponding member is generated, an STL file of the three-dimensional model is obtained, and coordinates of each point of the triangular patch of the curved surface structure are obtained by parsing the STL file.
3. The method for planning a curved surface hierarchical 3D printing path according to claim 1, wherein the adopting the corresponding projective transformation rule discretizes the surface into points according to the coordinates of the triangular patch points, and performs spatial projective transformation on the three-dimensional solid model of the component, specifically includes:
projecting each coordinate value of the obtained curved triangular patch onto a given arbitrary plane by utilizing vertical projection;
projecting coordinates on the three-dimensional solid model of the component to be printed onto the plane to obtain projection coordinates;
calculating the distance from any point on the three-dimensional solid model of the component to be printed to the given plane based on the projection coordinates and the normal vector of the plane; and further calculating the vector from the point on the three-dimensional solid model of the component to be printed to a given arbitrary plane and a formula between two points to obtain a projection coordinate value.
4. The curved surface layering 3D printing path planning method according to claim 1, wherein the member to be printed with the curved surface structure is a curved surface thin shell member or a non-thin shell structure with a curved surface.
5. The curved surface layering 3D printing path planning method according to claim 1, wherein the layering slicing and path planning of the transformed three-dimensional solid model adopts a planar layering algorithm and a Zigzag path filling algorithm for path filling.
6. A curved hierarchical 3D printing path planning system, comprising:
the three-dimensional modeling module is used for carrying out three-dimensional modeling on the component with the curved surface structure to be printed and generating a three-dimensional solid model of the corresponding component;
the three-dimensional solid model analysis module is used for analyzing the three-dimensional solid model of the component to obtain triangular patch point coordinates;
the projection conversion module is used for discretizing the surface into points according to the coordinates of the triangular patch points by adopting a corresponding projection conversion rule according to the structure of the component to be printed, and carrying out space projection conversion on the three-dimensional solid model of the component to obtain a converted three-dimensional solid model;
and the printing path planning module is used for carrying out layering slicing and path planning on the transformed three-dimensional solid model, inversely transforming the three-dimensional solid model after the path planning into an original three-dimensional solid structure and generating a curved surface printing path.
7. The curved surface hierarchical 3D printing path planning system according to claim 6, wherein the projective transformation module adopts corresponding projective transformation rules to discretize a surface into points according to triangular patch point coordinates, and performs spatial projective transformation on a three-dimensional solid model of the component, and specifically comprises:
projecting each coordinate value of the obtained curved triangular patch onto a given arbitrary plane by utilizing vertical projection;
projecting coordinates on the three-dimensional solid model of the component to be printed onto the plane to obtain projection coordinates;
calculating the distance from any point on the three-dimensional solid model of the component to be printed to the given plane based on the projection coordinates and the normal vector of the plane; and further calculating the vector from the point on the three-dimensional solid model of the component to be printed to a given arbitrary plane and a formula between two points to obtain a projection coordinate value.
8. The curved surface layered 3D printing path planning system of claim 6, wherein the component to be printed having a curved surface structure is a curved thin shell component or a non-thin shell structure having a curved surface.
9. A computer readable storage medium having stored thereon a computer program, which when executed by a processor performs the steps of a curved surface hierarchical 3D printing path planning method according to any of claims 1-5.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of a curved surface hierarchical 3D printing path planning method according to any of claims 1-5 when the program is executed by the processor.
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